Geometry Chapter 5 Review

Is the inverse true? If a triangle has three congruent sides, then it is equiangular.

Is the contra-positive true? If a triangle has three congruent sides, then it is equiangular.

Is the inverse true? If an isosceles triangle is obtuse, then its vertex angle is obtuse.

Is the contra-positive true? If an isosceles triangle is obtuse, then its vertex angle is obtuse.

Is the inverse true? If two lines are parallel, then they do not intersect.

Is the contra-positive true? If two lines are parallel, then they do not intersect.

Midsegment When a triangle’s sides are cut by medians, the relationship to the opposite side is _____.

Midsegment If a triangle’s midsegment measurement is x, the opposite side’s measurement is _____.

Identify the contradiction. I. Angles A and B are acute angles. II. Angle A = 45°. III. Angles A and B are supplementary.

Identify the contradiction. ABCD is a quadrilateral. ABCD is a square. Angle A > Angle D.

True or False and Explain An equilateral triangle cannot have a right angle.

Explain The base of an isosceles triangle has a length of 10 feet. What can you say about the length of the legs?

Explain Two sides of a triangle have lengths of 12 and 18. What can you say about the length of the third side? It can be any number between ____ and ____. How do you know?

Fill in the Blank The circumcenter of a right triangle lies inside, outside, or on the triangle?

Fill in the Blank The largest angle of a triangle is the angle opposite the __________ _________.

Circumcenter Find the center of the circle that circumscribes the triangle plotted at the following points: (-7, 3), (9, 3), and (-7, -7).

Fill in the Blank A _______ is from a vertex and cuts the opposite side of a triangle in half.

Fill in the Blank A ________ is from a vertex meeting the opposite side of a triangle at a 90° angle.

Fill in the Blank A _________ cuts a segment into two congruent parts at a right angle.

Fill in the Blank The ____________ of a statement has the opposite truth value.

Fill in the Blank Two collinear rays with the same endpoint are known as a ____________.

Fill in the Blank The medians of a triangle are concurrent at a point called the __________________.

Fill in the Blank A ____________ angle has a measure between 90 and 180.

Fill in the Blank Coplaner lines that do not intersect are called _________ lines.

Fill in the Blank Noncoplaner lines that do not intersect are called _________ lines.

Fill in the Blank A ________ triangle has one angle formed by perpendicular lines.

Fill in the Blank The point of concurrency (intersection) of the perpendicular bisectors of a triangle is the ____________________.

Fill in the Blank The point of concurrency (intersection) of the altitudes of a triangle is the ____________________.

Fill in the Blank The point of concurrency (intersection) of the medians of a triangle is the ____________________.